CVE-2026-40103

PoC —

CVSS 3.1

5.4 medium

EPSS

<1%p13

Published

Apr 10, 2026 (Apr 10, 2026)

Modified

Jun 17, 2026

Description

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, Vikunja's scoped API token enforcement for custom project background routes is method-confused. A token with only projects.background can successfully delete a project background, while a token with only projects.background_delete is rejected. This is a scoped-token authorization bypass. This vulnerability is fixed in 2.3.0.

Vendors: vikunja
Products: vikunja
Weakness: CWE-836
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

NVD CVE.org GitHub PoCs EPSS (0.2%)

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